metropolis n., pl. metropoles [Gk. mēt(ē)r mother (1); polis city (2): mother-state, mother-city, capital city.] 1. Mother-country. Founding state or city of a colony. 2. A capital. A chief city of a country. 3. A city well-known for a particular activity. Members of the Lagos Butchers Association traveled to Maiduguri, a cattle metropolis, to negotiate for the purchase of cows. 4. A metropolitan see such as that of an archbishop. Cf. métropole.
From Word Dictionary of Foreign Expressions